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<?php
/**
* PEAR_Task_Common, base class for installer tasks
*
* PHP versions 4 and 5
*
* @category pear
* @package PEAR
* @author Greg Beaver <cellog@php.net>
* @copyright 1997-2009 The Authors
* @license http://opensource.org/licenses/bsd-license.php New BSD License
* @link http://pear.php.net/package/PEAR
* @since File available since Release 1.4.0a1
*/
/**#@+
* Error codes for task validation routines
*/
define('PEAR_TASK_ERROR_NOATTRIBS', 1);
define('PEAR_TASK_ERROR_MISSING_ATTRIB', 2);
define('PEAR_TASK_ERROR_WRONG_ATTRIB_VALUE', 3);
define('PEAR_TASK_ERROR_INVALID', 4);
/**#@-*/
define('PEAR_TASK_PACKAGE', 1);
define('PEAR_TASK_INSTALL', 2);
define('PEAR_TASK_PACKAGEANDINSTALL', 3);
/**
* A task is an operation that manipulates the contents of a file.
*
* Simple tasks operate on 1 file. Multiple tasks are executed after all files have been
* processed and installed, and are designed to operate on all files containing the task.
* The Post-install script task simply takes advantage of the fact that it will be run
* after installation, replace is a simple task.
*
* Combining tasks is possible, but ordering is significant.
*
* <file name="test.php" role="php">
* <tasks:replace from="@data-dir@" to="data_dir" type="pear-config"/>
* <tasks:postinstallscript/>
* </file>
*
* This will first replace any instance of @data-dir@ in the test.php file
* with the path to the current data directory. Then, it will include the
* test.php file and run the script it contains to configure the package post-installation.
*
* @category pear
* @package PEAR
* @author Greg Beaver <cellog@php.net>
* @copyright 1997-2009 The Authors
* @license http://opensource.org/licenses/bsd-license.php New BSD License
* @version Release: 1.10.16
* @link http://pear.php.net/package/PEAR
* @since Class available since Release 1.4.0a1
* @abstract
*/
class PEAR_Task_Common
{
/**
* Valid types for this version are 'simple' and 'multiple'
*
* - simple tasks operate on the contents of a file and write out changes to disk
* - multiple tasks operate on the contents of many files and write out the
* changes directly to disk
*
* Child task classes must override this property.
*
* @access protected
*/
protected $type = 'simple';
/**
* Determines which install phase this task is executed under
*/
public $phase = PEAR_TASK_INSTALL;
/**
* @access protected
*/
protected $config;
/**
* @access protected
*/
protected $registry;
/**
* @access protected
*/
public $logger;
/**
* @access protected
*/
protected $installphase;
/**
* @param PEAR_Config
* @param PEAR_Common
*/
function __construct(&$config, &$logger, $phase)
{
$this->config = &$config;
$this->registry = &$config->getRegistry();
$this->logger = &$logger;
$this->installphase = $phase;
if ($this->type == 'multiple') {
$GLOBALS['_PEAR_TASK_POSTINSTANCES'][get_class($this)][] = &$this;
}
}
/**
* Validate the basic contents of a task tag.
*
* @param PEAR_PackageFile_v2
* @param array
* @param PEAR_Config
* @param array the entire parsed <file> tag
*
* @return true|array On error, return an array in format:
* array(PEAR_TASK_ERROR_???[, param1][, param2][, ...])
*
* For PEAR_TASK_ERROR_MISSING_ATTRIB, pass the attribute name in
* For PEAR_TASK_ERROR_WRONG_ATTRIB_VALUE, pass the attribute name and
* an array of legal values in
*
* @abstract
*/
public static function validateXml($pkg, $xml, $config, $fileXml)
{
}
/**
* Initialize a task instance with the parameters
*
* @param array raw, parsed xml
* @param array attributes from the <file> tag containing this task
* @param string|null last installed version of this package
* @abstract
*/
public function init($xml, $fileAttributes, $lastVersion)
{
}
/**
* Begin a task processing session. All multiple tasks will be processed
* after each file has been successfully installed, all simple tasks should
* perform their task here and return any errors using the custom
* throwError() method to allow forward compatibility
*
* This method MUST NOT write out any changes to disk
*
* @param PEAR_PackageFile_v2
* @param string file contents
* @param string the eventual final file location (informational only)
* @return string|false|PEAR_Error false to skip this file, PEAR_Error to fail
* (use $this->throwError), otherwise return the new contents
* @abstract
*/
public function startSession($pkg, $contents, $dest)
{
}
/**
* This method is used to process each of the tasks for a particular
* multiple class type. Simple tasks need not implement this method.
*
* @param array an array of tasks
* @access protected
*/
public static function run($tasks)
{
}
/**
* @final
*/
public static function hasPostinstallTasks()
{
return isset($GLOBALS['_PEAR_TASK_POSTINSTANCES']);
}
/**
* @final
*/
public static function runPostinstallTasks()
{
foreach ($GLOBALS['_PEAR_TASK_POSTINSTANCES'] as $class => $tasks) {
$err = call_user_func(
array($class, 'run'),
$GLOBALS['_PEAR_TASK_POSTINSTANCES'][$class]
);
if ($err) {
return PEAR_Task_Common::throwError($err);
}
}
unset($GLOBALS['_PEAR_TASK_POSTINSTANCES']);
}
/**
* Determines whether a role is a script
* @return bool
*/
public function isScript()
{
return $this->type == 'script';
}
public function throwError($msg, $code = -1)
{
include_once 'PEAR.php';
return PEAR::raiseError($msg, $code);
}
}
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